body {
    background-color: #000000;
}

#container{
    position: absolute;
    left: 50%;
    top: 50%;
    width: 800px;
    height: 700px;
    transform: translate(-50%,-50%);
    border:1px solid #fff  
}

#container p{
    color:#fff;
}

#solider{
    width:800px;
}

#canvas1 {
    position:relative;
    width: 800px;
    height: 700px;
}